Source/JavaScriptCore/runtime/NativeExecutable.cpp

/*
 * Copyright (C) 2009-2019 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
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#include "config.h"

#include "BatchedTransitionOptimizer.h"
#include "CodeBlock.h"
#include "Debugger.h"
#include "JIT.h"
#include "JSCInlines.h"
#include "LLIntEntrypoint.h"
#include "Parser.h"
#include "TypeProfiler.h"
#include "VMInlines.h"
#include <wtf/CommaPrinter.h>

namespace JSC {

const ClassInfo NativeExecutable::s_info = { "NativeExecutable", &ExecutableBase::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(NativeExecutable) };

NativeExecutable* NativeExecutable::create(VM& vm, Ref<JITCode>&& callThunk, TaggedNativeFunction function, Ref<JITCode>&& constructThunk, TaggedNativeFunction constructor, const String& name)
{
    NativeExecutable* executable;
    executable = new (NotNull, allocateCell<NativeExecutable>(vm.heap)) NativeExecutable(vm, function, constructor);
    executable->finishCreation(vm, WTFMove(callThunk), WTFMove(constructThunk), name);
    return executable;
}

void NativeExecutable::destroy(JSCell* cell)
{
    static_cast<NativeExecutable*>(cell)->NativeExecutable::~NativeExecutable();
}

Structure* NativeExecutable::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto)
{
    return Structure::create(vm, globalObject, proto, TypeInfo(NativeExecutableType, StructureFlags), info());
}

void NativeExecutable::finishCreation(VM& vm, Ref<JITCode>&& callThunk, Ref<JITCode>&& constructThunk, const String& name)
{
    Base::finishCreation(vm);
    m_jitCodeForCall = WTFMove(callThunk);
    m_jitCodeForConstruct = WTFMove(constructThunk);
    m_jitCodeForCallWithArityCheck = m_jitCodeForCall->addressForCall(MustCheckArity);
    m_jitCodeForConstructWithArityCheck = m_jitCodeForConstruct->addressForCall(MustCheckArity);
    m_name = name;

    assertIsTaggedWith(m_jitCodeForCall->addressForCall(ArityCheckNotRequired).executableAddress(), JSEntryPtrTag);
    assertIsTaggedWith(m_jitCodeForConstruct->addressForCall(ArityCheckNotRequired).executableAddress(), JSEntryPtrTag);
    assertIsTaggedWith(m_jitCodeForCallWithArityCheck.executableAddress(), JSEntryPtrTag);
    assertIsTaggedWith(m_jitCodeForConstructWithArityCheck.executableAddress(), JSEntryPtrTag);
}

NativeExecutable::NativeExecutable(VM& vm, TaggedNativeFunction function, TaggedNativeFunction constructor)
    : ExecutableBase(vm, vm.nativeExecutableStructure.get())
    , m_function(function)
    , m_constructor(constructor)
{
}

const DOMJIT::Signature* NativeExecutable::signatureFor(CodeSpecializationKind kind) const
{
    ASSERT(hasJITCodeFor(kind));
    return generatedJITCodeFor(kind)->signature();
}

Intrinsic NativeExecutable::intrinsic() const
{
    return generatedJITCodeFor(CodeForCall)->intrinsic();
}

CodeBlockHash NativeExecutable::hashFor(CodeSpecializationKind kind) const
{
    if (kind == CodeForCall)
        return CodeBlockHash(bitwise_cast<uintptr_t>(m_function));

    RELEASE_ASSERT(kind == CodeForConstruct);
    return CodeBlockHash(bitwise_cast<uintptr_t>(m_constructor));
}

} // namespace JSC